Headline
CVE-2016-4579: USN-2982-1: Libksba vulnerabilities | Ubuntu security notices | Ubuntu
Libksba before 1.3.4 allows remote attackers to cause a denial of service (out-of-bounds read and crash) via unspecified vectors, related to the “returned length of the object from _ksba_ber_parse_tl.”
17 May 2016
Libksba could be made to crash or run programs if it decoded specially crafted data.
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Releases
- Ubuntu 16.04 ESM
- Ubuntu 15.10
- Ubuntu 14.04 ESM
- Ubuntu 12.04
Packages
- libksba - X.509 and CMS support library
Details
Hanno Böck discovered that Libksba incorrectly handled decoding certain BER
data. An attacker could use this issue to cause Libksba to crash, resulting
in a denial of service. This issue only applied to Ubuntu 12.04 LTS and
Ubuntu 14.04 LTS. (CVE-2016-4353)
Hanno Böck discovered that Libksba incorrectly handled decoding certain BER
data. An attacker could use this issue to cause Libksba to crash, resulting
in a denial of service, or possibly execute arbitrary code. This issue only
applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2016-4354,
CVE-2016-4355)
Hanno Böck discovered that Libksba incorrectly handled incorrect utf-8
strings when decoding certain DN data. An attacker could use this issue to
cause Libksba to crash, resulting in a denial of service, or possibly
execute arbitrary code. This issue only applied to Ubuntu 12.04 LTS and
Ubuntu 14.04 LTS. (CVE-2016-4356)
Pascal Cuoq discovered that Libksba incorrectly handled incorrect utf-8
strings when decoding certain DN data. An attacker could use this issue to
cause Libksba to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2016-4574)
Pascal Cuoq discovered that Libksba incorrectly handled decoding certain
data. An attacker could use this issue to cause Libksba to crash, resulting
in a denial of service. (CVE-2016-4579)
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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.
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Related news
ber-decoder.c in Libksba before 1.3.3 does not properly handle decoder stack overflows, which allows remote attackers to cause a denial of service (abort) via crafted BER data.
Off-by-one error in the append_utf8_value function in the DN decoder (dn.c) in Libksba before 1.3.4 allows remote attackers to cause a denial of service (out-of-bounds read) via invalid utf-8 encoded data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-4356.
Off-by-one error in the append_utf8_value function in the DN decoder (dn.c) in Libksba before 1.3.4 allows remote attackers to cause a denial of service (out-of-bounds read) via invalid utf-8 encoded data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-4356.